Cyberdudebivash

Affected Device: TOTOLINK A3002R Router, firmware v4.0.0-B20230531.1404

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Overview Table

CVE ID	Type	Affected Endpoint	Impact	CVSSv3.1
CVE-2025-55588	Buffer Overflow / DoS	fw_ip parameter at /boafrm/formPortFw	Denial of Service (DoS)	7.5 (High)
CVE-2025-55589	OS Command Injection	macstr, bandstr, clientoff at /formMapDelDevice	Remote command execution risk	Medium
CVE-2025-55590	Command Injection	bupload.html component	Remote command execution risk	Medium

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Deep Dive Analysis

CVE-2025-55588 — Buffer Overflow → DoS

• Vulnerability in fw_ip at /boafrm/formPortFw.
• Remotely exploitable, no authentication needed.
• Risk: Complete router service crash, leaving network offline.
• CVSSv3.1 Score: 7.5 (High).

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CVE-2025-55589 — OS Command Injection

• Exploitable via parameters: macstr, bandstr, clientoff.
• Endpoint: /boafrm/formMapDelDevice.
• Risk: Arbitrary OS command execution by attacker.
• Classification: CWE-78 Command Injection.

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CVE-2025-55590 — Command Injection via File Upload

• Located in bupload.html upload handler.
• Risk: Remote attacker can run system-level commands.
• Classification: CWE-77 Improper Command Execution.

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CyberDudeBivash Impact Analysis & Defender Checklist

Attack Surface & Risk

• Remote, unauthenticated exploitation.
• Risks range from DoS (55588) to full compromise (55589, 55590).
• Consumer/SOHO routers are often unmonitored → high exploitation potential.

Mitigation Steps ( Do Now):

1. Identify A3002R routers with firmware v4.0.0-B20230531.1404.
2. Segment devices from sensitive corporate/SMB networks.
3. Patch/Update firmware if vendor fix is available.
4. Disable remote management and unnecessary port forwarding.
5. Monitor logs for abnormal requests hitting /formPortFw, /formMapDelDevice, and bupload.html.

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Strategic Insight

These CVEs are not isolated bugs but a cluster of router-level attack vectors. Attackers can weaponize them to:

• Disrupt internet connectivity for entire offices.
• Gain foothold at the network edge.
• Pivot into internal assets from an under-protected device.

For defenders, treating SOHO networking gear as Tier-1 assets is no longer optional—it’s the new battleground for adversaries.

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